Title of Invention

"A PROCESS FOR THE PREPARATION OF BRICK RED DYE FROM PLANT RESOURCES"

Abstract The present invention relates to a process for the preparation of Brick Red Dye from the leaves of Teak Plant {Tectona grandis) useful for dying of fabrics. Isolation procedure of obtaining the active ingredients as dye powder eliminates the handling and transportation of a large quantity of plant materials practiced in earlier days. The extracted dye can be stored and marketed as powder form to the user. By using this powder the standard shades can be reproduced as and when required. The leaves, a waste product of Teak tree can also be utilized for producing this dye pigment. The present invention of extraction is much more easier than the labourious and time taking conventional method of extraction. Further, the solvents used for extraction can be recycled. The process is economical and energy saving.
Full Text The present invention relates to a process for the preparation of Brick Red Dye from the leaves of Teak Plant {Tectona grandis) useful for dying of fabrics.
Background of the Invention
An awareness has been developed for the uses of eco-friendly natural dyes from plant resources due to the hazardous and carcinogenic effect of many synthetic dyes. Thus revival of natural dyeing technique as one of alternative is being emphasized in place of synthetic dyes in Textile industry. Many natural resources which contain many useful dye pigments are presently being wasted. We have developed here a process for the extraction of dye pigment and the dyeing technique for bright brick red shade dyeing of silk and wool fabrics using a natural dye.
In earlier days, the traditional method of natural dyeing was extremely crude and involved labourious and time taking process of extraction. The dyeing was done by heating chopped leaves of Teak tree {Tectona grandis) in water. Thus the method was energy expensive and uneconomical. The dyeing was fixed with different mordant. In this crude method the proper shade calculation is very difficult and reproduction of same shade for subsequent dyeing process is different. Further it is needless to say that the noticeable drawback of natural dyeing is that yet standardization of shades could not be done due to climatic/regional effect on the resources available and un-even extraction of the dye pigment on it.
Reference may be made to The Wealth of India, Vol- X, p-I36, 1995 (CSIR, New Delhi publication) wherein the dyeing was done by boiling chopped leaves of teak plant with water.
The drawbacks are as follows :
1. The proper shade calculation is very difficult.
Reproduction of same shade for subsequent dyeing process is different. Standardisation of shades cannot be done due to climatic/regional effect on the esources available.
2. There is un-even extraction of the dye pigment by crude method.
The main object of the present invention is to develop an extraction process for the preparation of qualitative brick red dye in powder form by using soxhlet extraction method from the leaves of Teak tree {Tectona grandis). The application of powder dye pigment on textile fabrics (silk and wool) is carried out to get a bright brick red shade, which can be reproduced easily as and when required by the user.
Another object of the present invention is to provide art eco-friendly process and being natural in origin the dye has no harmful effect.
Yet another object of the present invention is that the isolation procedure of obtaining the dye powder, eliminates the handling of large quantity of plant materials practiced in earlier days.
Yet another object of the present invention is that the present dyeing process is much easier for the calculation and reproduction of the shade as compared to the earlier traditional process.
Yet another object of the present invention is that the powder dye can be stored, transported and marketed easily.
Yet another object of the present invention is that the dye can be used for dyeing silk and wool yarn to obtain bright brick red shade.
Yet another object of the present invention is that the colour of the fiber both silk and wool obtained after dyeing with isolated powder dye remains stable and retained its fastness even after several washing and exposure to sunlight.
The distinction of novelty of the present invention is as follows :
a) Isolation procedure of obtaining the active ingredients as dye powder eliminates the handling and transportation of a large quantity of plant materials practiced in earlier days.
b) The extracted dye can be stored and marketed as powder form to the user.
c) By using this powder the standard shades can be reproduced as and when required.
d) The leaves, a waste product of Teak tree can also be utilized for producing this dye pigment.
e) The present invention of extraction is much more easier than the labourious and time taking conventional method of extraction. Further,
the solvents used for extraction can be recycled.
f) The process is economical and energy saving.
Accordingly, the present invention provides a process for the preparation of brick red
dye from plant resources which comprises extracting a brick red natural dye from
leaves of teak plant by soxhlet extraction method using a polar solvent.and purifying
the crude powder dye using petroleum ether and acetone mixture in a ratio of 1:5 to
obtain the dye.
In an embodiment of the present invention the polar solvent used is is about 20%
aqueous methanol
In yet another embodiment of the present invention solvent is recovered and recycled.
In another embodiment of the present invention waste dry leaves of teak (Tectona
grandis) plant is selected for extraction.
In yet another embodiment of the present invention crude dye obtained is
about 25%w/w of the dry leaves of Tectona grandis taken for extraction.
The following examples are given by way of illustration and therefore, should not be construed to limit the scope of the present invention.
EXAMPLE -1 The shade dried leaves of teak plant (1 kg.) is taken and extracted by 20% aqueous methanol using soxhlet extraction method. After removal of solvents, the crude dye powder (250 g) is isolated. The crude powder is purified using pet-ether and acetone mixture. The isolated dye powder is sparingly soluble in hot water and completely soluble in slightly alkaline medium at room temperature.
EXAMPLE - 2 The yam (5 kg) is treated with a combined mordant solution made of water (2 L) and CUSO4 (250 g) at the temperature 60 °C for wool and 90 °C for silk for 45 minutes.
The dye bath for wool yarn is prepared with the isolated dye powder (50 g) and 1 %
NaOH solution (2 L). After mordanting the yam (wool), it is soaked inside the dye
bath. The dyeing is carried out for 2 hours maintaining the bath temperature at 60 0C.
The dye bath for silk yarn is prepared with the isolated dye powder (50 g) and 1 %
NaOH solution (2 L). After mordanting the yam (silk), it is soaked inside the dye
bath. The dyeing is carried for 2 hrs. maintaining the bath temperature at 90 °C. After
dyeing the yam (wool and silk), it is squeezed and washed thoroughly with running
water and then with 2% soap solution and finally with water and dried in sunshine.
Light fastness of the dyed materials is observed.
The colour of the yarn (wool & silk) is observed bright brick red shade.
Standardization of shade is done with the extracted natural dye powder for several
times. The dye is useful to silk & wool fabrics.
Advantages:
The main advantages of the present invention are :
1. Being natural in origin the dye has no harmful effect.
2. The process is eco-friendly.
3. The isolation procedure of obtaining the dye powder, eliminates the handling of large quantity of plant materials practiced in earlier days.
4. Leaves of teak plant being a waste can also be utilized.
5. Present dyeing process is much easier for the calculation and reproduction of the shade as compared to the earlier traditional process.
6. The powder dye can well be stored, transported and marketed easily.
7. The dye can be used for dyeing silk and wool yarn to obtain bright brick red shade.
8. The present extraction method is convenient than the conventional labourious and time taking process.
9. The solvent used in extraction process can be recovefed and recycled.
10. The colour of the fiber both silk and wool obtained after dyeing with Isolated powder dye remains stable and retained its fastness even after several washing and exposure to sunlight.









We claim:
1. A process for the preparation of brick red dye from plant resources which comprises;
i) characterizing in treating dried leaves of teak plant by soxhlet extraction using
a polar solvent, ii) ii) isolating crude dye powder after removing solvent, iii) purifying the said red crude dye powder using petroleum -ether and acetone
mixture in a ratio of 1:5 to obtain the brick red dye.
2. A process as claimed in claim 1, wherein the polar solvent used is 20% aqueous methanol.
3. A process as claimed in claim 1, wherein the solvent used is recovered and recycled .
4. A process as claimed in claim 1, wherein shade dried leaves of teak {Tectona grandis) plant is selected for extraction.
5. A process as claimed in claim 1, wherein crude dye obtained is „t 25%w/w of the dry leaves of Tectona grandis taken for extraction.
6 A process for the preparation of brick red dye from plant resources substantially as herein described with reference to the examples.

Documents:

1882-DEL-2004-Abstract-(02-12-2010).pdf

1882-del-2004-abstract.pdf

1882-DEL-2004-Claims-(02-12-2010).pdf

1882-del-2004-claims.pdf

1882-DEL-2004-Correspondence-Others-(02-12-2010).pdf

1882-del-2004-correspondence-others.pdf

1882-del-2004-correspondence-po.pdf

1882-DEL-2004-Description (Complete)-(02-12-2010).pdf

1882-del-2004-description (complete).pdf

1882-del-2004-form-18.pdf

1882-del-2004-form-2.pdf

1882-DEL-2004-Form-3-(02-12-2010).pdf

1882-del-2004-form-3.pdf

1882-del-2004-form-5.pdf


Patent Number 245242
Indian Patent Application Number 1882/DEL/2004
PG Journal Number 02/2011
Publication Date 14-Jan-2011
Grant Date 10-Jan-2011
Date of Filing 30-Sep-2004
Name of Patentee COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH
Applicant Address RAFI MARG, NEW DELHI-110 001, INDIA.
Inventors:
# Inventor's Name Inventor's Address
1 BHAGABAT NANDA REGIONAL RESEARCH LABOROTORY BHUBHENESWAR ORISSA, INDIA.
2 NALIN BIHAREE DAS REGIONAL RESEARCH LABOROTORY BHUBHENESWAR ORISSA, INDIA.
3 AMALENDU NAYAK REGIONAL RESEARCH LABOROTORY BHUBHENESWAR ORISSA, INDIA.
PCT International Classification Number C09B 61/00
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA